Wood-molding machine



(No Model.)

' W. J. SMITH.

WOOD MOLDING MACHINE. No. 376,269. Patented Jan. 10, 1888.

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UNITED STATES PATENT OFFICE..

WALTER J. SMITH, OF PHILADELPHIA, PENNSYLVANIA.

wooD-MoLDING MACHINE.

SPECIFICATION forming part of Letters PatentNo. 376,269.,dated January 10, 1888.

Application tiled May 4, 1857. Serial No. 237,087. (N o model.)

TaaZZ whom it may concern.-

Be it known that l, WALTER J. SMITH, of Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented a new and useful Improvement in Wood-Molding Machines, of which the following is a full,

clear, and exact description, reference being had to theA accompanying drawings, and to the letters of referencemarked thereon.

My invention consists of an appliance which can be adjustably attached to a wood-molding machine, such as shown and described in my pending application, Serial No. 236,753, led May 2, 1887,` and by means of which I am en-A abled to describe a segment ofa circle ofany radius without being obliged to find the center of such'circle,and my improved appliance can be further used as a bearing for molding curved work.

In the drawings, Figure l is a front view 0f a wood-molding machine with my appliance attached. Fig. 2 isa perspective view of my appliance detached; and Fig. 3, a detail top view, partly in cross section, showing the manner of attaching the angle-irons.

Similar letters of `reference indicate similar parts in all the figures.

A is a plate attached to the front of the frame of a wood-molding vmachine having the T-shaped grooves a formed therein.

B B are angle-irons provided with slotted segmental projections b b( and with projections c c', having slots parallel with the angle-irons. The angle-irons are beveled at their upper ends, sov that they can be adjusted at an angle Theangle-irons are attached to the frame A by meansv of T-headed bolts h, inserted in the T-shaped grooves a and passing through the slots in the angleirons. It will be seen that the angle-irons can be adjusted ou the plate A at any desired angle of not less than forty-five degrees, the point of contact ot the angle-irons being in a line with the axis of the tool-spindle C.

For forming the segment ot' a circle of any' radius without finding the center the operation is'as follows: Supposing it is required to form a segment of a circle having a spring of thirty inches to aV base of eight feet, I take a piece of board, as D, (shown in dotted outline in Fig. 1,) and draw a line, d d, eight feet in length. VFrom apoint midway of this line I draw a line, e e', at a right angle to the line d d, thirty inches in length. Supposing the distance from the cutting-tool to the apex of the anglebars is four inches, I take two nails and drive them into the board on the line d d at points four inches from each end of the line d d, as shown at g g. The angle-bars are then adjusted so that when the board is supported by the nails g g in a true horizontal plane on the angle-bars and the cutting-tool is in contact with the board at the point e they will be in the requisite position, and by starting the cut at one end of the line marked d d on theboard and advancing the board, constantly keeping the nails bearing on the angle-irons, a cut will be made in a true circle from end to end ot' the line, and thus form a segment of a circle having the requisite spring and base length.

Having described my invention, I claim- 1. Ina wood-molding machine, the combination, with a cuttingtool and a front plate provided with a series of parallel grooves, of a pair ofangle-irons or supports having plane bearingsurt'aces arranged at an angle to the axis of the cutting-tool, and headed bolts adjustable in the parallelgrooves, whereby said angle-irons are secured, substantially as specified.

2. In a wood-molding machine, a cuttingtool and a front plate having a series of parallel grooves, combined with a pair of angleirons or supports having plane bearing-surfaces arranged at an angle to the axis of the cutting-tool, said angle-irons being provided with elongated slots, and supports adjustably retained in said slots and in the parallel grooves, substantially as specified.

In testimony whereof I have hereunto set my handa-nd seal.

Vitnesses: S. E. MAIREs, BENJ. WILLIAMs. 

